US2685370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal machine for continuous operation
Assignee: Sulzer Escher Wyss AG
•
Filing: 1951-08-20
•
Granted: 1954-08-03
•
Expires: 1971-08-20
Abstract
No abstract record available.
Inventors
- 👤 Ruegg Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:14
CPC Classifications
B; B04; B04B; B04B3/00; B04B3/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
NL7368C
Cited
US1138608A
Cited
US1165567A
Cited
US1842464A
Cited
US2096594A
Cited
GB494409A
Cited
US2232768A
Cited
US2232769A
Cited
US2232770A
Cited
DE699927C
Cited
CH220555A
Cited
US2472425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |